//
//  ScriptableAvatar.h
//  assignment-client/src/avatars
//
//  Created by Clement on 7/22/14.
//  Copyright 2014 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

#ifndef hifi_ScriptableAvatar_h
#define hifi_ScriptableAvatar_h

#include <AnimationCache.h>
#include <AnimSkeleton.h>
#include <AvatarData.h>
#include <ScriptEngine.h>
#include <EntityItem.h>

/**jsdoc
 * The <code>Avatar</code> API is used to manipulate scriptable avatars on the domain. This API is a subset of the 
 * {@link MyAvatar} API. To enable this API, set {@link Agent|Agent.isAvatar} to <code>true</code>.
 *
 * <p>For Interface, client entity, and avatar scripts, see {@link MyAvatar}.</p>
 *
 * @namespace Avatar
 *
 * @hifi-assignment-client
 *
 * @comment IMPORTANT: This group of properties is copied from AvatarData.h; they should NOT be edited here.
 * @property {Vec3} position - The position of the avatar.
 * @property {number} scale=1.0 - The scale of the avatar. The value can be set to anything between <code>0.005</code> and 
 *     <code>1000.0</code>. When the scale value is fetched, it may temporarily be further limited by the domain's settings.
 * @property {number} density - The density of the avatar in kg/m<sup>3</sup>. The density is used to work out its mass in
 *     the application of physics. <em>Read-only.</em>
 * @property {Vec3} handPosition - A user-defined hand position, in world coordinates. The position moves with the avatar
 *    but is otherwise not used or changed by Interface.
 * @property {number} bodyYaw - The left or right rotation about an axis running from the head to the feet of the avatar.
 *     Yaw is sometimes called "heading".
 * @property {number} bodyPitch - The rotation about an axis running from shoulder to shoulder of the avatar. Pitch is
 *     sometimes called "elevation".
 * @property {number} bodyRoll - The rotation about an axis running from the chest to the back of the avatar. Roll is
 *     sometimes called "bank".
 * @property {Quat} orientation - The orientation of the avatar.
 * @property {Quat} headOrientation - The orientation of the avatar's head.
 * @property {number} headPitch - The rotation about an axis running from ear to ear of the avatar's head. Pitch is
 *     sometimes called "elevation".
 * @property {number} headYaw - The rotation left or right about an axis running from the base to the crown of the avatar's
 *     head. Yaw is sometimes called "heading".
 * @property {number} headRoll - The rotation about an axis running from the nose to the back of the avatar's head. Roll is
 *     sometimes called "bank".
 * @property {Vec3} velocity - The current velocity of the avatar.
 * @property {Vec3} angularVelocity - The current angular velocity of the avatar.
 * @property {number} audioLoudness - The instantaneous loudness of the audio input that the avatar is injecting into the
 *     domain.
 * @property {number} audioAverageLoudness - The rolling average loudness of the audio input that the avatar is injecting
 *     into the domain.
 * @property {string} displayName - The avatar's display name.
 * @property {string} sessionDisplayName - <code>displayName's</code> sanitized and default version defined by the avatar mixer 
 *     rather than Interface clients. The result is unique among all avatars present in the domain at the time.
 * @property {boolean} lookAtSnappingEnabled=true - <code>true</code> if the avatar's eyes snap to look at another avatar's
 *     eyes when the other avatar is in the line of sight and also has <code>lookAtSnappingEnabled == true</code>.
 * @property {string} skeletonModelURL - The avatar's FST file.
 * @property {AttachmentData[]} attachmentData - Information on the avatar's attachments. 
 *     <p class="important">Deprecated: This property is deprecated and will be removed. Use avatar entities instead.</p>
 * @property {string[]} jointNames - The list of joints in the current avatar model. <em>Read-only.</em>
 * @property {Uuid} sessionUUID - Unique ID of the avatar in the domain. <em>Read-only.</em>
 * @property {Mat4} sensorToWorldMatrix - The scale, rotation, and translation transform from the user's real world to the
 *     avatar's size, orientation, and position in the virtual world. <em>Read-only.</em>
 * @property {Mat4} controllerLeftHandMatrix - The rotation and translation of the left hand controller relative to the
 *     avatar. <em>Read-only.</em>
 * @property {Mat4} controllerRightHandMatrix - The rotation and translation of the right hand controller relative to the
 *     avatar. <em>Read-only.</em>
 * @property {number} sensorToWorldScale - The scale that transforms dimensions in the user's real world to the avatar's
 *     size in the virtual world. <em>Read-only.</em>
 * @property {boolean} hasPriority - <code>true</code> if the avatar is in a "hero" zone, <code>false</code> if it isn't.
 *     <em>Read-only.</em>
 * @property {boolean} hasScriptedBlendshapes=false - <code>true</code> if blend shapes are controlled by scripted actions, 
 *     otherwise <code>false</code>. Set this to <code>true</code> before using the {@link MyAvatar.setBlendshape} method, 
 *     and set back to <code>false</code> after you no longer want scripted control over the blend shapes.
 *     <p><strong>Note:</strong> This property will automatically be set to true if the Controller system has valid facial 
 *     blend shape actions.</p>
 * @property {boolean} hasProceduralBlinkFaceMovement=true - <code>true</code> if avatars blink automatically by animating 
 *     facial blend shapes, <code>false</code> if automatic blinking is disabled. Set this property to <code>false</code> if 
 *     you wish to fully control the blink facial blend shapes via the {@link MyAvatar.setBlendshape} method.
 * @property {boolean} hasProceduralEyeFaceMovement=true - <code>true</code> if the facial blend shapes for an avatar's eyes 
 *     adjust automatically as the eyes move, <code>false</code> if this automatic movement is disabled. Set this property 
 *     to <code>true</code> to prevent the iris from being obscured by the upper or lower lids. Set this property to  
 *     <code>false</code> if you wish to fully control the eye blend shapes via the {@link MyAvatar.setBlendshape} method.
 * @property {boolean} hasAudioEnabledFaceMovement=true - <code>true</code> if the avatar's mouth blend shapes animate 
 *     automatically based on detected microphone input, <code>false</code> if this automatic movement is disabled. Set 
 *     this property to <code>false</code> if you wish to fully control the mouth facial blend shapes via the 
 *     {@link MyAvatar.setBlendshape} method.
 *
 * @example <caption>Create a scriptable avatar.</caption>
 * (function () {
 *     Agent.setIsAvatar(true);
 *     print("Position: " + JSON.stringify(Avatar.position));  // 0, 0, 0
 * }());
 */

class ScriptableAvatar : public AvatarData, public Dependency {
    Q_OBJECT

    using Clock = std::chrono::system_clock;
    using TimePoint = Clock::time_point;

public:

    ScriptableAvatar();

    /**jsdoc
     * Starts playing an animation on the avatar.
     * @function Avatar.startAnimation
     * @param {string} url - The animation file's URL. Animation files need to be in glTF or FBX format but only need to 
     *     contain the avatar skeleton and animation data. glTF models may be in JSON or binary format (".gltf" or ".glb" URLs 
     *     respectively).
     *     <p><strong>Warning:</strong> glTF animations currently do not always animate correctly.</p>
     * @param {number} [fps=30] - The frames per second (FPS) rate for the animation playback. 30 FPS is normal speed.
     * @param {number} [priority=1] - <em>Not used.</em>
     * @param {boolean} [loop=false] - <code>true</code> if the animation should loop, <code>false</code> if it shouldn't.
     * @param {boolean} [hold=false] - <em>Not used.</em>
     * @param {number} [firstFrame=0] - The frame at which the animation starts.
     * @param {number} [lastFrame=3.403e+38] - The frame at which the animation stops.
     * @param {string[]} [maskedJoints=[]] - The names of joints that should not be animated.
     */
    /// Allows scripts to run animations.
    Q_INVOKABLE void startAnimation(const QString& url, float fps = 30.0f, float priority = 1.0f, bool loop = false,
                                    bool hold = false, float firstFrame = 0.0f, float lastFrame = FLT_MAX, 
                                    const QStringList& maskedJoints = QStringList());

    /**jsdoc
     * Stops playing the current animation.
     * @function Avatar.stopAnimation
     */
    Q_INVOKABLE void stopAnimation();

    /**jsdoc
     * Gets the details of the current avatar animation that is being or was recently played.
     * @function Avatar.getAnimationDetails
     * @returns {Avatar.AnimationDetails} The current or recent avatar animation.
     * @example <caption>Report the current animation details.</caption>
     * var animationDetails = Avatar.getAnimationDetails();
     * print("Animation details: " + JSON.stringify(animationDetails));
     */
    Q_INVOKABLE AnimationDetails getAnimationDetails();

    /**jsdoc
     * @comment Uses the base class's JSDoc.
     */
    Q_INVOKABLE virtual QStringList getJointNames() const override;

    /**jsdoc
     * @comment Uses the base class's JSDoc.
     */
    /// Returns the index of the joint with the specified name, or -1 if not found/unknown.
    Q_INVOKABLE virtual int getJointIndex(const QString& name) const override;

    /**jsdoc
     * @comment Uses the base class's JSDoc.
     */
    Q_INVOKABLE virtual void setSkeletonModelURL(const QUrl& skeletonModelURL) override;

    /**jsdoc
     * @comment Uses the base class's JSDoc.
     */
    int sendAvatarDataPacket(bool sendAll = false) override;

    virtual QByteArray toByteArrayStateful(AvatarDataDetail dataDetail, bool dropFaceTracking = false) override;

    /**jsdoc
     * Gets details of all avatar entities.
     * <p><strong>Warning:</strong> Potentially an expensive call. Do not use if possible.</p>
     * @function Avatar.getAvatarEntityData
     * @returns {AvatarEntityMap} Details of all avatar entities.
     * @example <caption>Report the current avatar entities.</caption>
     * var avatarEntityData = Avatar.getAvatarEntityData();
     * print("Avatar entities: " + JSON.stringify(avatarEntityData));
     */
    Q_INVOKABLE AvatarEntityMap getAvatarEntityData() const override;

    AvatarEntityMap getAvatarEntityDataNonDefault() const override;

    AvatarEntityMap getAvatarEntityDataInternal(bool allProperties) const;

    /**jsdoc
     * Sets all avatar entities from an object.
     * <p><strong>Warning:</strong> Potentially an expensive call. Do not use if possible.</p>
     * @function Avatar.setAvatarEntityData
     * @param {AvatarEntityMap} avatarEntityData - Details of the avatar entities.
     */
    Q_INVOKABLE void setAvatarEntityData(const AvatarEntityMap& avatarEntityData) override;

    /**jsdoc
     * @comment Uses the base class's JSDoc.
     */
    Q_INVOKABLE void updateAvatarEntity(const QUuid& entityID, const QByteArray& entityData) override;

public slots:
    /**jsdoc
     * @function Avatar.update
     * @param {number} deltaTime - Delta time.
     * @deprecated This function is deprecated and will be removed.
     */
    void update(float deltatime);

    /**jsdoc
     * @function Avatar.setJointMappingsFromNetworkReply
     * @deprecated This function is deprecated and will be removed.
     */
    void setJointMappingsFromNetworkReply();

private:
    AnimationPointer _animation;
    AnimationDetails _animationDetails;
    QStringList _maskedJoints;
    AnimationPointer _bind; // a sleazy way to get the skeleton, given the various library/cmake dependencies
    std::shared_ptr<AnimSkeleton> _animSkeleton;
    QHash<QString, int> _fstJointIndices; ///< 1-based, since zero is returned for missing keys
    QStringList _fstJointNames; ///< in order of depth-first traversal
    QUrl _skeletonFBXURL;
    mutable QScriptEngine _scriptEngine;
    std::map<QUuid, EntityItemPointer> _entities;

    /// Loads the joint indices, names from the FST file (if any)
    void updateJointMappings();

    quint64 _lastSendAvatarDataTime { 0 };

    TimePoint _nextTraitsSendWindow;
};

#endif // hifi_ScriptableAvatar_h